Theoretical description of dissociative 2 scattering in diatomic molecules

K Jänkälä (1, 2) , Ph V Demekhin (1) , S Heinäsmäki (2) , I Haar (1) , R Hentges (1) , A Ehresmann (1)

1 Institute of Physics
2 Department of Physical Sciences [Oulu]

The paper describes the theoretical formulation of dissociative γ → 2γ ? scattering in fixed-in-space and randomly oriented diatomic molecules in the dipole approximation for excitation and 2γ ? production. Based on perturbation theory the double differential cross section and two-photon angular correlation function of the process is derived. The developed theory is applied to study the angular correlation function of the two Lyman-α photons produced via decay of the doubly-excited Q 2 1 Π u (1) state of the H 2 molecule.

Mots clés: Physical Sciences

K Jänkälä, Ph V Demekhin, S Heinäsmäki, I Haar, R Hentges, et al.. Theoretical description of dissociative 2 scattering in diatomic molecules. Journal of Physics B: Atomic, Molecular and Optical Physics, 2010, 43 (6), pp.65104. ⟨10.1088/0953-4075/43/6/065104⟩. ⟨hal-00630008⟩